"Marcus solus non habitat."

Translation: Marcus does not live alone.

[PauloMuffato]

Is solus here an adverb? Are adverbs in Latin flexed?

[clemc0]

Sōlus: [color=blue] m ♂ - Adjective

There are three degrees of Adjectives: Regular or Positive, Comparative and Superlative

Latin Adverbs are Invariable, they do not Decline, so they do not Inflect for Declension.

[loi123456]

Is 'solus' depend on 'Marcus' or 'habitat'